What is the current standard? XHTML 1.1 became a W3C Recommendation on May 31, 2001. CSS 2 became a W3C Recommendation on June 7, 2011. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html version="-//W3C//DTD XHTML 1.1//EN" xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3.org/1999/xhtml http://www.w3.org/MarkUp/SCHEMA/xhtml11.xsd" > <head> <title>Virtual Library</title> </head> <body> <p>Content is <a href="http://example.org/">good</a>.</p> </body> </html>
RDFa, Rich Snippets, Microdata & other delights <div itemscopeitemtype="http://data-vocabulary.org/Person"> My name is <span itemprop="name">Bob Smith</span> but people call me <span itemprop="nickname">Smithy</span>. Here is my home page: <a href="http://www.example.com" itemprop="url">www.example.com</a> I live in Albuquerque, NM and work as an <span itemprop="title">engineer</span> at <span itemprop="affiliation">ACME Corp</span>. </div>
The Semantic Web is a "web of data" that facilitates machines to understand the semantics, or meaning, of information on the World Wide Web. It extends the network of hyperlinked human-readable web pages by inserting machine-readable metadata about pages and how they are related to each other, enabling automated agents to access the Web more intelligently and perform tasks on behalf of users.
What is Semantic Markup, or Meta-Data? Meta-data can be a difficult concept to grasp. So for example, here is some regular data: (+1)212 867 5309 Of course, most of us will guess correctly that this as a telephone number, but computer systems have no way of knowing that. They see it as a string of numbers – it could be anything! So that’s where meta-data comes in. <span class=”telephone”>(+1)212 867 5309</span>